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It's been rather quiet on the Amazon Kindle Fire front of late. Most of the small form factor tablet rumour action has been around the second-generation Nexus 7 - now official - and the possible Retina-display iPad mini. But a number of specifications have emerged that are alleged to be those of the 7-inch and 8.9-inch 2013 Kindle Fire HD models.

Boy Genius Report claims that it has heard several of the key specs for both tablets from multiple sources. These are not confirmed, with Amazon declining to comment when the site contacted them, but if true could place the new Kindles head-to-head with their new equivalents from Google/Asus and Apple.

The 7-inch version, it is claimed, will come with a 1920 x 1200 screen, which is an identical resolution to the Nexus 7. It will have a quad-core Qualcomm Snapdragon 800 processor - capable of recording and playing 4K content - and BGR says that prototypes have been clocked at 2GHz.

The site also says it will have 2GB of RAM, 16GB, 32GB or 64GB of on-board storage, a front-facing camera, Wi-Fi and cellular connectivity. It states that the current operating system on the internal testing machines runs Android 4.2.2.

As for the 8.9-inch version, it is alleged to come with a 2560 x 1600 display and many of the same features, including the front-facing camera and Snapdragon 800 processor. It will also have an 8-megapixel camera on the rear, says BGR.

The 7-inch model will not have a rear camera, it is said.

According to the site's sources, the look and feel of the tablets will be different. They will be lighter and it is claimed that the 7-inch model will have a half-an-inch bezel around the screen, while the 8.9-inch Kindle Fire HD will have a bezel that's about three-quarters-of-an-inch wide.

BGR also says that an entry-level Kindle Fire will be introduced, starting with an 8GB model.

There are currently no suggestions as to when these devices may surface.